Putting it simply if you want your message to be remembered put it into a list of three.

Think about – if there are only three points that I would like to leave my audience with, what would they be? And then use no more than three themes per slide.Here are more examples of the rule of three.

“Life, liberty, and the pursuit of happiness” - the American Declaration of Independence

“Government of the people, by the people, for the people” - the Gettysburg Address